http://www.iteye.com/news/16485
top --> right --> bottom --> left
content --> padding --> border --> margin
box-sizing: content-box / border-box
default value of IE6 is border-box, but the standard of W3C is content-box.
http://www.iteye.com/news/16485
top --> right --> bottom --> left
content --> padding --> border --> margin
box-sizing: content-box / border-box
default value of IE6 is border-box, but the standard of W3C is content-box.

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